/// <summary>
/// Performs translation to target
/// </summary>
/// <param name="gameTime">Game time</param>
/// <param name="newInterest">New interest</param>
/// <param name="radius">Radius to decelerate</param>
/// <param name="slow">Slow</param>
private void UpdateTranslations(GameTime gameTime)
{
if (this.translationMode != CameraTranslations.None)
{
Vector3 diff = this.translationInterest - this.Interest;
Vector3 pos = this.Position + diff;
Vector3 dir = pos - this.Position;
float distanceToTarget = dir.Length();
float distanceThisMove = 0f;
if (this.translationMode == CameraTranslations.UseDelta)
{
distanceThisMove = this.MovementDelta * gameTime.ElapsedSeconds;
}
else if (this.translationMode == CameraTranslations.UseSlowDelta)
{
distanceThisMove = this.SlowMovementDelta * gameTime.ElapsedSeconds;
}
else if (this.translationMode == CameraTranslations.Quick)
{
distanceThisMove = distanceToTarget * this.translationOutOfRadius;
}
Vector3 movingVector;
if (distanceThisMove >= distanceToTarget)
{
//This movement goes beyond the destination.
movingVector = Vector3.Normalize(dir) * distanceToTarget * this.translationIntoRadius;
}
else if (distanceToTarget < this.translationRadius)
{
//Into slow radius
movingVector = Vector3.Normalize(dir) * distanceThisMove * (distanceToTarget / this.translationRadius);
}
else
{
//On flight
movingVector = Vector3.Normalize(dir) * distanceThisMove;
}
if (movingVector != Vector3.Zero)
{
this.Position += movingVector;
this.Interest += movingVector;
}
if (Vector3.NearEqual(this.Interest, this.translationInterest, new Vector3(0.1f, 0.1f, 0.1f)))
{
this.StopTranslations();
}
}
}
/// <summary>
/// Rotate to target
/// </summary>
/// <param name="target">Target</param>
/// <param name="up">Up vector</param>
/// <param name="yAxisOnly">Rotate Y axis only</param>
/// <param name="interpolationAmount">Interpolation amount for linear interpolation</param>
/// <param name="updateState">Update internal state</param>
public void RotateTo(Vector3 target, Vector3 up, bool yAxisOnly = true, float interpolationAmount = 0, bool updateState = false)
{
if (this.Parent != null)
{
//Set parameters to local space
var parentTransform = Matrix.Invert(this.Parent.FinalTransform);
target = Vector3.TransformCoordinate(target, parentTransform);
}
if (!Vector3.NearEqual(this.position, target, new Vector3(MathUtil.ZeroTolerance)))
{
var newRotation = Helper.LookAt(this.position, target, up, yAxisOnly);
newRotation = Helper.RotateTowards(this.rotation, newRotation, interpolationAmount);
this.SetRotation(newRotation, updateState);
}
}